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Earthquake Hazard Issues and Analytical Tools

Earthquakes — particularly the large events that occur along major faults and subduction zones — are among the most fascinating natural phenomena, inspiring human curiosity and scientific investigation for centuries. At the same time, they are profoundly destructive, posing serious hazards to life and property and demanding our careful attention.

The primary objective of this site is to provide technical insight into earthquake hazard analysis. The focus is on the analytical foundations of hazard formulation, supported by a series of interactive pages designed to help users grasp complex concepts more intuitively.

Below is a list of topics accompanied by interactive learning tools.

Building Seismicity Models for Faults and Subduction Zones

Building a realistic regional seismicity model is a labor- and data-intensive process. It requires decades of collecting and processing geologic data on crustal faults, historical and instrumental recording of regional earthquakes, and geodetic data, among other things. The web pages at the following link discuss several concepts and analytical issues. There are links to interactive tools for constructing and examining seismicity models of faults and subduction zones.

Building Seismicity Models for Faults and Subduction Zones

Earthquake Hazard Analysis

A full-scale regional probabilistic seismic hazard analysis (PSHA) is a complex procedure that requires substantial data and analytical capabilities. Many different geologic, tectonic, and seismological factors impact earthquake hazard analysis. The following link discusses the formulation of PSHA and provides interactive tools for users to examine how different fault, earthquake, and ground motion parameters impact the PSHA results.

Earthquake Hazard Analysis

Earthquake Ground Motion Simulation and Response Spectral Analysis

Earthquake Ground Motion Simulation and Response Spectral Analysis

USGS Seismicity Model: Faults in the Western US

USGS Seismicity Model: Faults in the Western US

USGS Seismicity Model: Earthquake Scenarios for the Western US

USGS Seismicity Model: Earthquake Scenarios for the Western US

User-Based Global Earthquake Scenarios for Ground Motion Analysis

User-Based Global Earthquake Scenarios for Ground Motion Analysis

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